The State of Web Vitals

CDN impact

Time to first byte by CDN provider, measured in real-user Chrome data.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Phone field outcomes
Metric TTFB LCP FCP
1

At a glance the headline numbers for CDN impact

Time to first byte by CDN provider, measured in real-user Chrome data.

15
Providers ranked
After min-sites filter
310,278
Sites in sample
Combined across all items
2.0s
Best LCP (p75)
KeyCDN
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by LCP at p75, fastest first

# Provider LCP p75 Passing Sites
1 KeyCDN 2.0s 86.9%
1,168
2 Google Cloud CDN 2.1s 84.0%
30,748
3 jsDelivr 2.2s 81.2%
13,065
4 Bunny CDN 2.2s 81.1%
17,219
5 Azure CDN 2.2s 81.8%
394
6 Fastly 2.3s 81.0%
80,918
7 cdnjs 2.3s 80.3%
17,025
8 Cloudflare 2.3s 80.2%
81,609
9 CloudFront 2.3s 79.9%
50,794
10 Akamai 2.3s 78.8%
7,352
11 Vercel Edge 2.4s 78.4%
2,717
12 Imperva/Incapsula 2.4s 76.5%
473
13 unpkg 2.5s 74.1%
5,586
14 Netlify Edge 2.6s 72.1%
1,025
15 Sucuri 2.7s 67.7%
185
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
3

Passing LCP per CDN which group passes the LCP most often

CDNSitesPassing LCPp75
KeyCDN 0.6% 1,168 87% 2.0s
Google Cloud CDN 16.2% 30,748 84% 2.1s
Azure CDN 0.2% 394 82% 2.2s
jsDelivr 6.9% 13,065 81% 2.2s
Bunny CDN 9.1% 17,219 81% 2.2s
Fastly 42.6% 80,918 81% 2.3s
cdnjs 9% 17,025 80% 2.3s
Cloudflare 43% 81,609 80% 2.3s
CloudFront 26.7% 50,794 80% 2.3s
Akamai 3.9% 7,352 79% 2.3s
Vercel Edge 1.4% 2,717 78% 2.4s
Imperva/Incapsula 0.2% 473 77% 2.4s
unpkg 2.9% 5,586 74% 2.5s
Netlify Edge 0.5% 1,025 72% 2.6s
Sucuri 0.1% 185 68% 2.7s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good LCP (2.5s at p75) · one value per site

87% of KeyCDN sites pass LCP. Sucuri trails 19 points behind, leaving 32% of its sites failing. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
4

All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75

LCP
INP
CLS
FCP
TTFB
Cloudflare 43%
802.3s
91137ms
870.03
741.8s
591.2s
Fastly 42.6%
812.3s
91139ms
860.03
761.8s
611.1s
CloudFront 26.7%
802.3s
90145ms
850.04
751.8s
611.1s
Google Cloud CDN 16.2%
842.1s
91144ms
880.03
811.6s
72866ms
Bunny CDN 9.1%
812.2s
93133ms
880.03
751.8s
591.2s
cdnjs 9%
802.3s
93131ms
870.03
741.8s
601.2s
jsDelivr 6.9%
812.2s
92137ms
870.03
751.8s
611.1s
Akamai 3.9%
792.3s
92137ms
860.03
751.8s
561.2s
unpkg 2.9%
742.5s
90144ms
850.04
672.1s
531.3s
Vercel Edge 1.4%
782.4s
85165ms
840.04
761.8s
78729ms
KeyCDN 0.6%
872.0s
91148ms
890.04
841.6s
74842ms
Netlify Edge 0.5%
722.6s
78187ms
740.12
731.9s
531.1s
Imperva/Incapsula 0.2%
772.4s
83170ms
810.08
721.9s
65980ms
Azure CDN 0.2%
822.2s
84154ms
820.08
791.7s
72889ms
Sucuri 0.1%
682.7s
96136ms
830.06
582.3s
361.7s
60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites

One row per CDN, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.

KeyCDN leads on LCP: 87% of its sites pass. Sucuri trails at 68%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
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Related signals Marketing pixels (10) → Bot detection (7) → Forms (4) → Personalization (5) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured